Fullsreen Background Slideshow

Good time of day, I'm from Ukraine, so sorry for my English, I try to make a website, only know HTML and CSS, and JavaScript from never worked, and according to it, I complete zero. I need to make a full-screen gallery where JavaScript can not do without. Downloaded a sample gallery that I like, but you need something to change it. I'm the fourth day of editing, but it fails because it is entirely in JavaScript. That must ask for your help. That is the gallery htt p://ww w. onlinedisk. ru/file/958914/ . I decided to change it as an image htt p://i47.tinypic.com/35d0lxt.jpg . The first button shows all image gallery, second and last a previous and next image, and the third stop / play. Also, when you hover over the keys change their background. Container size of keys 42px. I think its clear opinion stated if that ask. Help please, do not pass by, but I was disappointed at all and if you do not go as I planned at all let down this deal.